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The anatomy of a person’s muscles, their structure and development, perhaps, can be called the most urgent topic that causes the maximum public interest in bodybuilding. Needless to say that it is the structure, work and muscle function that is the topic that a personal trainer should pay special attention to. As in the presentation of other topics, we begin the introduction to the course with a detailed study of the anatomy of the muscles, their structure, classification, work and functions.
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Muscles are organs of the body, which are formed by elastic tissue, and whose activity is regulated by nerve impulses. The functions of the muscles - this is including, the movement and movement in space of parts of the human body. Their full-fledged functioning directly affects the physiological activity of many processes in the body. Muscle work is regulated by the nervous system. It contributes to their interaction with the brain and spinal cord, and also participates in the process of converting chemical energy into mechanical
Slow fibers are more resistant to fatigue, but at the same time, fast fibers are not adapted to prolonged physical activity. As for the ratio of fast and slow muscle fibers in the muscles of a person, their number is approximately the same. In most of both sexes, about 45-50% of the muscles of the limbs are made up of slow muscle fibers. However, there are no significant gender differences in the ratio of different types of muscle fibers in men and women. Their relationship is formed at the beginning of the human life cycle, in other words, it is genetically programmed and remains almost unchanged until old age.